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【单选题】
When a firm's demand curve is tangent to its average total cost curve:A.
the firm must be operating in a monopolistically competitive market.
B.
economic profits are zero.
C.
the firm must be earning economic profits.
D.
the firm must be incurring economic losses.
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皮皮学刷刷变学霸
举一反三
【单选题】The magician picked some persons from the audience _____ and asked them to help him with the performance．
A.
by accident
B.
in vain
C.
at random
D.
on average
【单选题】The magician picked several persons from the audience and asked them to help him with the performance.
A.
by accident
B.
on occasion
C.
at random
D.
on an average
【单选题】船舶在台风进路上,台风中心即将来临,此时北半球如何操纵船舶离开险区__?
A.
右尾受风驶向可航半圆
B.
右首受风滞航
C.
右首顶风全速驶离
D.
左尾受风驶向可航半圆
【简答题】请问拷贝构造函数在哪三种情况下会被调用?
【简答题】The magician picked several persons from the audienceand asked them to help him with the performance. A. by accident B. on occasion C. at random D. on an average
【多选题】关于劳动合同下列说法正确的是（ ）。
A.
《劳动合同法》第3条规定：“订立劳动合同，应当遵循合法、公平、平等自愿、协商一致、诚实信用的原则”
B.
由于权利和义务是相互对应的，一方的权利即为对方的义务，劳动合同往往从权利方面表述双方的权利义务关系
C.
合同的条款分为法定条款和约定条款，不违反法律和行政法规，具有与法定条款同样的约束力
D.
《劳动合同法》规定非全日制用工双方当事人可以订立口头协议
E.
企业劳动合同有效应当具备如下四个要件：劳动合同签订的主体、内容、形式和订立程序合法
【单选题】船舶在台风进路上,台风中心即将来临,此时在北半球如何操纵船舶离开险区?
A.
右尾受风驶向可航半圆
B.
右首受风滞航
C.
右首顶风全速驶离
D.
左尾受风驶向可航半圆
【多选题】关于劳动合同下列说法正确的是____。
A.
《劳动合同法》第3条规定：“订立劳动合同，应当遵循合法、公平、平等自愿、协商一致、诚实信用的原则”
B.
由于权利义务是相互对应的，一方的权利即为对方的义务，劳动合同往往从权利方面表述双方的权利义务关系
C.
合同的条款分为法定条款和约定条款，不违反法律和行政法规，具有与法定条款同样的约束力
D.
《劳动合同法》规定非全日制用工双方当事人可以订立口头协议E．企业劳动合同有效应当具备如下四个要件：劳动合同签订的主体、内容、形式和订立程序合法
【单选题】The magician picked several persons ______ from the audience and asked them to help him with the performance.
A.
by accident
B.
at random
C.
on occasion
D.
on average
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